Well-door for elevators.



PATBNTLD MAM, 1903'.

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PATENT -flfEErcE.

VILLIAIWI A. CROSS, OF CHICAGO, ILLINOIS.

WELL-DOOR FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent N0. 727,098, dated May 5,1903. Application iiled February 28, 1903. Serial No. 145,517. (Normodel .To all whom/ t 11m/y concern,.-

Be it known that I, WILLIAM A. CRoss, a citizen of the United States of America, and a resident of the city of Chicago, in the State of Illinois, have invented certain new and useful Improvements in Well-Doors for Elevators, of which the following is a specification.

The present invention relates to that type of well-doors for the freight-elevators of warehouses and the like in which the doors are formed in sections which move in vertical guides and are Vconnected Ytogether to move in unison in opposite directions in the opening and closing movements of the doors; and the present improvement has for its object to provide a simple and eective arrangement of the door-sections with relation to each other and with relation to the door-openings, Where` hereinafter more fully appear and be morev particularly pointed out in the claims.

In the accompanying drawings, illustrative of the present invention, FigureV 1 is a vertical sectional elevation of a series of elevatorwell doors, illustrating the present invention with a pair of the door-sections in position to close the door-opening of the elevator-well; Fig. 2, a similar View illustrating said doorsections in an opened condition to suchdooropening. Fig. 3 is an enlarged fragmentary horizontal section at line x at, Fig. l, illustrating the vertical side guides for door-sections; Fig. 4, an enlarged fragmentary elevation of the same, illustrating the sheave arrangement over which the iiexible connections between the door-sectionspass and are supported.

Similar numerals of reference indicate like parts in the several views.

In the present typeof vertically-moving sectional doors for elevator-wells 'of Warehouses and the like the doors are of a necessity arranged wholly within the elevator-Well, so that an objectionable gap occurs at each floor between the adjacent edges of the respective thresholds and the elevator platform and which gap is a serious obstruction to the free and easy passage of the ordinary hand-trucks off and on the elevator-platform. In a very common form of such doors the pair of door sections or halves are arranged in immediately-adjacent vertical planes, and in consequence of such arrangement thelgap or space heretofore mentioned ordinarily exceeds the combined thickness of the upper and lower sections or halves'of the door. With a View to materially reduce the width of such gap the present improvement involves a novel construction and arrangement of parts, as follows:

l 4represents a portion of the inclosing wall of the elevator well, 2 the door openings formed in such wall'at the diiferent floors of the building, and 3 a portion of the elevator cab or platform.

4.and 5 are the respective upper and lower sections or halves, which together constitute a vertically-moving well-door of the present construction. v

6 represents vertically-arranged guides secured to the wall of the elevator-well at the respective Vertical sides of the series of dooropenings 2, and each of suchguides is formed with duplicate grooved Ways 7 and 8 in immediate parallel relation, in which the doorsections 4 and 5 are guided in their vertical movement.

The described arrangement is such that the series 'of upper doorsections 4 move in vertical alinement one with the other, While the series of lower door-sections 5in like manner move in vertical alinement one with the other and in a vertical plane immediately adjacent to that in which the series of upper sections 4 have movement.

In the present improvement the series of upper door-sections 4'aforesaid are arranged in immediate relation to the face of the wall l, while the other series of lower door-sections 5 are arranged in a plane farther removed from the face of such wall l and as clearly illustrated in Figs. l and 2 of the drawings. Such particular arrangement is a material part of the present invention in that the same coacts with the arrangement of thresholds hereinafter described in affording a simple and efficient combination of parts in which the usual gap between the dilferent thresholds of the door-openings and the adjacent end of of metal, as shown, and which extend into.

the elevator-well a distance equal, approximately, to the thickness of one of the doorsections.

With the described arrangement of the door-sections and ofthe extension-thresholds the series of lower door-sections 5 will have vertical movement in immediate adjacent relation to their respective extension-thresholds 9 and so that the gap left between the projecting end of such thresholds and the adjacent end of the elevator-platform will be a little larger than the thickness of a lower section 5.

' l0 represents stop-flanges on the lower ends of the upper door-sections 4f. Such stoplanges are adapted to rest upon the top of the lower door'sections 5 to close the horizontal joints at the meeting-points of the door-sections when any two companion sections are in a position to close a particular door-opening.

1l represents sheaves or pulleys secured to the guides 6, and 12 represents flexible connections or chains passing over said sheaves, with their respective ends secured to the companion upper and lower door-sections 4 and 5, as usual in the present type of elevatorwell doors. Y v

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of an elevator-Well having a vertical series of door-openings and a series of doors formed iu sections arranged to move vertically in opposite directions in immediately-adjacent planes, the upper series of such door-sections being arranged next adjacent to the Wall of the elevator-well, substantially as set forth.

2. The combination of an elevator-well having a vertical series of door-openin gs, a series of doors formed in sections arranged to move vertically in opposite directions in immediately-adjacent planes, the upper series of such door-sections being arranged next adjacent to the wall of the elevator-well, and a series of extension-thresholds arranged to project into the elevator-well, substantially as se forth. Y

Signed at Chicago, Illinois, this 21st day of February, 1903.

WILLIAM A. CROSS.

Witnesses:

ROBERT BURNS, M. H. HOLMES. 

